Zoom!
Leaving the Spartan army headquarters left Clark feeling good, he constantly felt like he was being tickled by his future wife. As Albert drove, once again, he started humming a random lullaby.
Getting to meet his friends again and celebrating his birthday with them refreshed his brain in ways that he found mysterious, he suddenly felt calmer and more collected.
This was a boon on its own already, now getting to solicit the help of his friends to get them to help fulfill his ambition was another. That not being enough, Professor Monkey Hands now surprised him with a mech.
As he rejoiced while humming, he could not help but think again about what prompted the Professor to proactively look for a mech designer for him.
He was still serious in his decision to keep his ability to pilot mechs a secret, letting the world know about such a secret was too irresponsible and rash of him. He had to continue keeping it a secret if he loved his life.